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Release Date: 9/17/2026
Format: MP3
Size: 178.38 MB
A collection of read speech recordings in Ngombale (Ngombale).
Restrictions/Special Constraints
None provided.
Forbidden Usage
It is forbidden to attempt to determine the identity of speakers in the Common Voice datasets. It is forbidden to re-host or re-share this dataset.
Intended Use
This dataset is intended to be used for training and evaluating automatic speech recognition (ASR) models. It may also be used for applications relating to computer-aided language learning (CALL) and language or heritage revitalisation.
nla)This datasheet is for cv-corpus-27.0-2026-09-11 of the Mozilla Common Voice Scripted Speech dataset for Ngombale [Ngombale - nla]. The dataset contains 4775 clips representing 9.19 hours of recorded speech (8.92 hours validated) from 15 speakers, recorded from a text corpus of 985 sentences.
The dataset includes the following self-declared age and gender distributions. A coverage summary is shown below each table.
Self-declared gender information. The table shows clip and speaker counts with percentages. Speakers who did not declare a gender are listed as Unspecified. A dash (-) indicates zero.
| Code | Gender | Clips | Speakers |
|---|---|---|---|
| male_masculine | Male, masculine | - | - |
| female_feminine | Female, feminine | - | - |
| transgender | Transgender | - | - |
| non-binary | Non-binary | - | - |
| do_not_wish_to_say | Prefer not to say | - | - |
| - | Unspecified | 4,775 (100.0%) | 15 (100.0%) |
Gender declared: 0 of 4,775 clips (0.0%), 0 of 15 speakers (0.0%)
Self-declared age information. The table shows clip and speaker counts with percentages. Speakers who did not declare an age are listed as Unspecified. A dash (-) indicates zero.
| Code | Age | Clips | Speakers |
|---|---|---|---|
| teens | Teens | - | - |
| twenties | Twenties | - | - |
| thirties | Thirties | - | - |
| fourties | Fourties | - | - |
| fifties | Fifties | - | - |
| sixties | Sixties | - | - |
| seventies | Seventies | - | - |
| eighties | Eighties | - | - |
| nineties | Nineties | - | - |
| - | Unspecified | 4,775 (100.0%) | 15 (100.0%) |
Age declared: 0 of 4,775 clips (0.0%), 0 of 15 speakers (0.0%)
Clip buckets
| Bucket | Clips |
|---|---|
| Validated | 4,635 (97.1%) |
| Invalidated | 135 (2.8%) |
| Other | 5 (0.1%) |
Training splits
| Split | Clips |
|---|---|
| Train | 592 (12.8%) |
| Dev | 172 (3.7%) |
| Test | 220 (4.7%) |
Training split coverage: 984 of 4,635 validated clips (21.2%)
The dataset contains 4635 validated, 135 invalidated, and 5 unresolved clips. The average clip duration is 6.93 seconds.
Validated sentences: 984
| Category | Count |
|---|---|
| Unvalidated sentences | 1 |
| Pending sentences | 1 |
| Rejected sentences | - |
| Reported sentences | - |
The corpus contains 985 sentences: 984 validated and 1 unvalidated (1 pending review, 0 rejected), with 0 reported for review.
There follows a randomly selected sample of five sentences from the corpus.
Kə́ ŋə̂ yé tóusʉ nkʉ po, mə́i có zə̂u yi mboʼ ə́ ghʉ tə.
No ləpe kə gháʼa mbə́ lə̂ no sə̌u zêi ?
Pəcó pəntwoghʼtə pətə́koʼ pəkúnye fúfú pághʼ pə̂.
Ngwǒ lə̂ có tʉ̌-ghə̂m nkâʼ zʉ́, ə́ shʉ́ʼ tə́koʼ ngwʉ̂ mə́u.
Ə́ nyâŋ lə̂ lwoŋ ləfou yi ə́ tə́ʉ ndəu ngəp nye-njwi, lə̂ ntûʼ ye mbəʉ zʉ́.
| Source | Sentences |
|---|---|
| self | 984 (100.0%) |
Each row of a tsv file represents a single audio clip, and contains the following information:
client_id - hashed UUID of a given user
path - relative path of the audio file
sentence - the sentence to be read aloud
sentence_id - unique identifier for the sentence
sentence_domain - domain classification(s) of the sentence
up_votes - number of people who said audio matches the text
down_votes - number of people who said audio does not match text
age - age of the speaker1
gender - gender of the speaker1
accents - accents of the speaker1
variant - variant of the language1
locale - locale code of the language
segment - if sentence belongs to a custom dataset segment, it will be listed here
validated_sentences.tsvThe validated_sentences.tsv file contains one row per validated sentence in the text corpus:
sentence_id - unique identifier for the sentence
sentence - the sentence text
variant - the variant of the language
sentence_domain - the domain(s) the sentence belongs to
source - the source the sentence was collected from
is_used - whether the sentence is still in circulation for recording
clips_count - number of clips recorded for this sentence
unvalidated_sentences.tsvThe unvalidated_sentences.tsv file contains one row per unvalidated sentence in the text corpus:
sentence_id - unique identifier for the sentence
sentence - the sentence text
variant - the variant of the language
sentence_domain - the domain(s) the sentence belongs to
source - the source the sentence was collected from
up_votes - number of upvotes the sentence received
down_votes - number of downvotes the sentence received
status - current status of the sentence (pending or rejected)
This dataset was partially funded by the Open Multilingual Speech Fund managed by Mozilla Common Voice.
This dataset is released under the Creative Commons Zero (CC-0) licence. By downloading this data you agree to not determine the identity of speakers in the dataset.
For a full list of age, gender, and accent options, see the demographics spec. These will only be reported if the speaker opted in to provide that information. ↩ ↩2 ↩3 ↩4